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太原理工大学理学院
纸质出版:2010
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李鑫, 吴桂英, 贾昊凯. 挡墙对冲击波削弱作用的数值分析[J]. 中北大学学报(自然科学版), 2010,31(4):360-363.
李鑫, 吴桂英, 贾昊凯. Numerical Simulation of the Weakening Effect of Retaining Wall on Shock Wave[J]. 2010, 31(4): 360-363.
基于任意拉格朗日-欧拉(Arbitrary Lagrange-Euler
ALE)算法
采用有限元软件AutoDyn对TNT炸药地面起爆后
爆炸冲击波遇到挡墙时的传播及挡墙对冲击波的削弱作用进行了三维数值分析.分析了爆炸冲击波遇到挡墙后的反射、绕射及绕射后汇聚的全过程
并通过改变炸药比距离、挡墙尺寸分析了其对冲击波的削弱作用.结果表明:在挡墙作用下
挡墙背面冲击波峰值到达时间将被延长
相对于自由空气中挡墙背面的压力峰值将大大减小;在挡墙高度一定的情况下
其宽度越宽
对冲击波的削弱作用越强
但当挡墙高宽比H/B≤0.25时
挡墙宽度的影响将会很小.
Based on arbitrary lagrange-euler(ALE) algorithm
using finite element software AutoDyn
the propagation was analyzed when the explosion shock wave met the retaining wall after the TNT detonated on the sand ground.Weakening of shock wave subjected to different sizes of wall was studied.The results show that relative to free air
the arrival time of the overpressure behind the wall is delayed and the value is greatly reduced.When the height of the wall keeps constant
the weakening effect is increased with the width of the wall until the aspect ratio H/B≤0.25.
Remennikov A M,Rose T A.Modelling blast loads on buildings in complex city geometries[J].Computers&Structures,2005,83:2197-2205.
Fernando Di az Alonso,Gonza′lez Enrique,Ferrada S.Consequence analysis by means of characteristic curves todeterminethe damage to buildings from the detonation of explosive substances as a function of TNT equivalence[J].Journal of Loss Prevention,2008,21:74-81.
王飞,朱立新,顾文彬,等.基于ALE算法的空气冲击波绕流数值模拟研究[J].工程爆破,2002,8(2):13-16.Wang Fei,Zhu Lixin,Gu Wenshan et al.Numerical simulation of shock wave around-flow on basis of ALEalgorithm[J].Engineering Blasting,2002,8(2):13-16.(in Chinese)
吴开腾.挡墙对爆炸形成的空气冲击波防护效应的三维数值模拟研究[J].内江师范学院学报,2003,18(2):5-11.Wu Kaiteng.3D Numerical simulation of protective effect of the wall on explosive shock wave[J].Journal ofNeijiang Teachers College,2003,18(2):5-11.(in Chinese)
穆朝民,任辉启,李永池.爆炸冲击波作用于墙体及对墙体绕射的实验研究[J].实验力学,2008,23(2):169-174.Mu Zhaomin,Ren Huiqi,Li Yongchi.Experimental study of blast wave reflection and diffraction on a shelter wall[J].Journal of Experimental Mechanics,2008,23(2):169-174.(in Chinese)
Zhou X Q,Hao H.Prediction of airblast loads on structures behind a protective barrier[J].International Journal ofImpact Engineering,2008,53:63-375.
都浩,李忠献,郝洪.建筑物外部爆炸超压荷载的数值模拟[J].解放军理工大学学报,2007,8(5):413-418.Du Hao,Li Zhongxian,Hao Hong.Numerical simulation on blast over pressure loading outside buildings[J].Journal of PLA University of Science and Technology,2007,8(5):413-418.(in Chinese)
Century Dynamics.AUTODYN 2-D&3-D.User′s Manual[M].2003.
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